<template>
     <div>
               <el-form v-loading="loading" element-loading-text="正在登录..." element-loading-spinner="el-icon-loading"
            element-loading-background="rgba(0, 0, 0, 0.8)" :rules="rules" ref="loginForm" :model="loginForm"
            class="loginContainer">
                       <h3 class="loginTitle">系统登录</h3>
                       <el-form-item prop="username">
                               <el-input type="text" v-model="loginForm.username" auto-complete="false"  
                    placeholder="请输入用户名"></el-input>
                           </el-form-item>
                       <el-form-item prop="password">
                               <el-input type="password" v-model="loginForm.password" auto-complete="false"  
                    placeholder="请输入密码"></el-input>
                           </el-form-item>
                       <el-form-item prop="code">
                               <el-input size="normal" type="text" v-model="loginForm.code" auto-complete="false"
                    placeholder="点击图片更换验证码" style="width: 255px;margin;right: 3px"></el-input>
                               <img :src="captchaUrl" @click="updateCaptcha">
                           </el-form-item>
                       <el-checkbox class="loginRemember" v-model="checked">记住我</el-checkbox>
                       <el-button type="primary" style="width: 100%" @click="submitLogin">登录</el-button>
                   </el-form>
           </div>
</template>


<script>
import { postRequest } from "../utils/api";
export default {
    name: "Login",
    data() {
        return {
            captchaUrl: '/captcha?time=' + new Date(),
            loginForm: {
                username: 'admin',
                password: '123',
                code: ''
            },
            loading: false,
            checked: true,
            rules: {
                username: [{
                    required: true, message: '请输入用户名', trigger:
                        'blur'
                }],
                password: [{
                    required: true, message: '请输入密码', trigger:
                        'blur'
                }],
                code: [{
                    required: true, message: '请输入验证码', trigger:
                        'blur'
                }]
            }
        }
    },
    methods: {
        updateCaptcha() {
            this.captchaUrl = '/captcha?time=' + new Date();
        },
        submitLogin() {
            this.$refs.loginForm.validate((valid) => {
                if (valid) {
                    this.loading = true;
                    postRequest('/login', this.loginForm).then(resp => {
                        this.loading = false;
                        if (resp) {
                            //存储用户token
                            const tokenStr = resp.obj.tokenHead + resp.obj.token;
                            window.sessionStorage.setItem('tokenStr', tokenStr);
                            //清空菜单
                            this.$store.commit('initRoutes', []);
                            //页面跳转
                            let path = this.$route.query.redirect;
                            this.$router.replace((path == '/' || path == undefined) ?
                                '/home' : path);
                        }
                    })
                } else {
                    this.$message.error('请输入所有字段');
                    return false;
                }

            }
            )
        }
    }
}
</script>

<style>
.loginContainer {
    border-radius: 15px;
    background-clip: padding-box;
    margin: 180px auto;
    width: 350px;
    padding: 15px 35px 15px 35px;
    background: #fff;
    border: 1px solid #eaeaea;
    box-shadow: 0 0 25px #cac6c6;
}

.loginTitle {
    margin: 0px auto 40px auto;
    text-align: center;
    color: #505458;
}

.loginRemember {
    text-align: left;
    margin: 0px 0px 15px 0px;
}

.el-form-item__content {
    display: flex;
    align-items: center;
}
</style>